Vagus nerve stimulation (VNS). Stimulation on the vagus nerve is a means of regulating the excitability of nerve cells with out inducing seizures. The vagus nerve, which commences in the brainstem, has several branches, and vagal nerve stimulation is utilized medically to normalize heart rate in those with cardiac arrhythmias. https://brainhealthusa.com/psychiatrist-in-san-marino-los-angeles-county/